Part 72203 Center Stand Pipe for 22" & 24" Sand Filter TanksReplacement internal standpipe for Swimline Hydrotools 22" and 24" sand filters and sand filter systems systems The Part 72203 Center Stand Pipe for 22 and 24 Inch Sand Filter System Tanks Features Include Genuine Hydrotools replacement part for Hydrotools 22" and 24" sand filters and sand filter systems Replaces standpipe found in Model 72220 and 72420 sand filter systems Replacement standpipe for Model 72200 and 72400 sand filters Constructed of